Johnston, SC 10-Day Weather Charts

24 Hour Forecast

Current Conditions - Mostly Clear. Temperature is 90°F32°C, dew point 71°F22°C, humidity 53%. Wind direction is N at 0 mph0 km/h with visibility of 10 mi16 km. Barometric pressure is 29.99 in1016 mb.

Today - Partly sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Southwest winds around 5 mph. Chance of rain 50 p.. Full Forecast

Tonight - Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. So.. Full Forecast

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10 Day High/Low Temp Chart

10 Day High/Low Temp Chart

10 Day POP Chart

10 Day Dew Point Chart

10 Day Dew Point Chart

10 Day Humidity Chart

10 Day UV Index Chart

10 Day Barometric Pressure Chart

10 Day Barometric Pressure Chart